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Author Batrouni, G. G. ♦ de Forcrand, P.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ HUBBARD MODEL ♦ FERMI GAS MODEL ♦ MONTE CARLO METHOD ♦ COMPUTERIZED SIMULATION ♦ HIGH-TC SUPERCONDUCTORS ♦ THEORETICAL DATA ♦ CALCULATION METHODS ♦ CRYSTAL MODELS ♦ DATA ♦ INFORMATION ♦ MATHEMATICAL MODELS ♦ NUCLEAR MODELS ♦ NUMERICAL DATA ♦ SIMULATION ♦ SUPERCONDUCTORS 360207* -- Ceramics, Cermets, & Refractories-- Superconducting Properties-- (1992-)
Abstract We discuss the fermion sign problem and, by examining a very general Hubbard-Stratonovich transformation, argue that the sign problem cannot be solved with such methods. We propose a different kind of transformation which, while not solving the sign problem, shows more detailed information about the system. With our transformation it is [ital trivial] to tell which auxiliary field configurations give a positive sign and which give a negative sign. We then discuss briefly various properties of this transformation and construct an algorithm which with one simulation gives results for a whole range of particle densities and Hubbard [ital U] values, positive and negative. Our approach is in excellent agreement with exact calculations.
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1993-07-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 48
Issue Number 1


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